Metric socket flat head, Class 12.9, 1.75mm
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Material
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Zinc plated class 12.9 alloy steel
A high strength heat treated alloy steel. Zinc plated for moderate corrosion resistance. A heat treated alloy steel for applications where very high strength and hardness are required.
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Class 12.9 alloy steel black oxide finish
A high strength heat treated alloy steel. A heat treated alloy steel for applications where very high strength and hardness are required. A chemically produced coating that leaves the steel surface with a matte black finish and offers mild corrosion resistance.
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